Title: Correction of NPL-2013 estimate of the Boltzmann constant for argon isotopic composition and thermal conductivity
Abstract:In 2013, a team from NPL, Cranfield University and SUERC published an estimate of the Boltzmann constant based on precision measurements of the speed of sound in argon. A key component of our results ...In 2013, a team from NPL, Cranfield University and SUERC published an estimate of the Boltzmann constant based on precision measurements of the speed of sound in argon. A key component of our results was an estimate of the molar mass of the argon gas used in our measurements. To achieve this we made precision comparison measurements of the isotope ratios found in our experimental argon against the ratios of argon isotopes found in atmospheric air. We then used a previous measurement of the atmospheric argon isotope ratios to calibrate the relative sensitivity of the mass spectrometer to different argon isotopes. The previous measurement of the atmospheric argon isotope ratios was carried out at KRISS using a mass spectrometer calibrated using argon samples of known isotopic composition, which had been prepared gravimetrically.Read More
Publication Year: 2015
Publication Date: 2015-08-19
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 25
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot